Porterfield Brake Pads for 2012 BMW 550i GT xDrive Compound:R-4 Air Purification Mode - When

Air Purification Mode - When turned on

and a tech will get you the necessary information

Long-Lasting Reliability - LED technology provides extended operational life compared to traditional bulbs

Built for straightforward installation with hand tools

The trumpet-style runner entries are engineered to reduce airflow turbulence while increasing overall volumetric efficiency

Porterfield Brake Pads for 2012 BMW 550i GT xDrive Compound:R-4 Air Purification Mode - WhenPorterfield Brake Pads for 2012 BMW 550i GT xDrive Porterfield R4 Porterfield R4 Carbon Kevlar based brake pads were fully designed for heavy duty extreme motorsports use. Its one of the the few true motorsports competition pads available on the market today. The carbon based semi metallic R4 brake material allows the brake pad to absorb huge amounts of heat and dissipate it quickly and evenly over time. The Carbon Kevlar material also allows the